Yet another Lume shot

This time it is the Breguet Type XX Transatlantique. I have always liked the Type XX and XXI from Breguet. Initially I preferred the Type XXI, but after looking at the Breguet Type XX, more so the Transatlantique, I find myself drawn towards the Type XX Transatlantique, reference 3820. 

Anyway, the lume shot. I find it interesting as one of the chronograph sub-dial is actually luminous. This allows for the user to use the chronograph function in the dark, well up to 30 minutes anyway. How cool is that?

The watch.